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Method for audio input gain control for audio devices that do not support gain control

Publishing Venue

Abstract

Disclosed is a method for audio input gain control for audio devices that do not support gain control. Benefits include improved usability.

Country

United States

Language

English (United States)

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This is the abbreviated version, containing approximately
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Method for audio input gain control for audio devices that
do not support gain control

Disclosed is a method for audio input gain control for audio
devices that do not support gain control. Benefits
include improved usability.

Background

� � � � � Conventionally, some
sound cards and universal serial bus (USB) recording devices do not provide
microphone input gain control to adjust the gain level. In these cases, most
audio recording applications disable the user interface (UI) element that
enables the user to adjust the gain. In some cases, the UI element is not made
available at all, making it harder for the users to adjust the gain level. A
novice user is not able to adjust the microphone input gain level. This problem
typically occurs when the use is having a voice chat using chat client
applications.

Description

� � � � � The disclosed method
is gain control for each input audio line. When the user selects the microphone
input to record audio, the corresponding gain control is made visible to the
user using a UI element, such as a slider control. If the gain control is not
present, then the master gain control is made visible.

� � � � � The following steps
attach the master gain control if the mixer input line does not have gain
control:

1. � � Get the audio input
mixer handle.

2. � � Set the selected input
mixer line for recording.

3. � � Check if the selected
input mixer line has controls.

4. � � For each control exposed by the mixer line,
find the gain control. (Note...